Enter your gross monthly income and recurring monthly debt payments (housing, auto, credit cards, student loans) to calculate your front-end and back-end DTI ratios.
How to use this calculator
Enter your total gross monthly household income (before taxes and deductions).
Enter your monthly rent payment or expected mortgage payment (Principal, Interest, Taxes, Insurance).
Enter all monthly auto loan, credit card minimum, student loan, and personal loan payments.
Read your Front-End DTI (Housing Ratio) and Back-End DTI (Total Debt Ratio).
Review your mortgage lender qualification rating based on standard 28/36 and 43% DTI caps.
Gross income is pre-tax. Total monthly debt includes housing, auto loans, student loans, and credit card minimums.
Example
$7,500 monthly income with $1,800 housing, $400 car, $200 cards, $300 student loans ($2,700 total debt) → Front-End DTI: 24.0%, Back-End DTI: 36.0% (Excellent).
Key insights
The Front-End DTI ratio measures housing costs alone divided by gross income; lenders prefer 28% or lower.
The Back-End DTI ratio measures ALL recurring monthly debts combined divided by gross income; 36% is ideal and 43% is the standard Qualified Mortgage limit.
FHA loans permit back-end DTI ratios up to 50% under automated underwriting approval with compensating factors.
Non-recurring living expenses like groceries, utility bills, and insurance premiums are NOT included in DTI calculations.
How to interpret your result
Back-End DTI Ratio
The single most critical ratio used by mortgage underwriters to assess default risk.
Front-End DTI Ratio
The percentage of gross pre-tax income devoted strictly to shelter costs.
Lender Qualification Rating
Categorizes your risk tier against standard Fannie Mae, Freddie Mac, and FHA underwriting thresholds.
Frequently asked questions
What is a good Debt-to-Income (DTI) ratio?
A back-end DTI ratio of 36% or lower is considered excellent by lenders, while 43% is generally the maximum for standard conventional mortgages.
Are utilities and groceries included in my DTI ratio?
No, DTI only includes contractual debt obligations (mortgages, auto loans, credit card minimums, student loans, personal loans).
How can I lower my DTI ratio quickly?
You can lower your DTI by paying off small credit card balances or car loans to eliminate monthly payments, or by increasing gross income.
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